LWTools Old Repo: src/pass1.c annotate

annotate src/pass1.c @ 37:538e15927776

Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes

author	lost
date	Sat, 03 Jan 2009 04:20:49 +0000
parents	39d750ee8d34
children	4bb7b723e5b7

rev	line source
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	1 /*
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	2 pass1.c
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	3 Copyright © 2008 William Astle
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	4
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	5 This file is part of LWASM.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	6
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	7 LWASM is free software: you can redistribute it and/or modify it under the
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	8 terms of the GNU General Public License as published by the Free Software
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	9 Foundation, either version 3 of the License, or (at your option) any later
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	10 version.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	11
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	12 This program is distributed in the hope that it will be useful, but WITHOUT
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	15 more details.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	16
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	17 You should have received a copy of the GNU General Public License along with
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	18 this program. If not, see <http://www.gnu.org/licenses/>.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	19
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	20
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	21 Handles first pass of assembly
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	22
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	23 First pass involves the following:
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	24
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	25 1. read all lines from the main source file, following all "include"
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	26 directives as appropriate
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	27 2. each operand is evaluated for syntax and futher for value if there are
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	28 multiple addressing sizes available; any undefined or not fully resolved
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	29 value will default to the largest addressing size available (16 bit)
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	30 3. addresses are assigned to every symbol defined in the assembly
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	31 4. macros are defined and expanded at this pass
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	32
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	33 * note: the lines are re-evaluated on the second pass
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	34
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	35 All source lines are read into memory with a record of the file name and
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	36 line number within the files.
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	37
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	38 Lines are one of the following formats:
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	39
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	40 <symbol> <opcode> <operand> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	41 <symbol> <opcode> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	42 <opcode> <operand> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	43 <opcode> <comment>
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	44
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	45 A "*" or ";" appearing anywhere on the line that is not otherwise interpreted
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	46 as part of an operation code or operand introduces a comment.
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	47
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	48 Certain lwasm specific operations are prefixed with a "*" to aid in source
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	49 code portability (like *pragma).
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	50 */
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	51
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	52 #ifdef HAVE_CONFIG_H
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	53 #include "config.h"
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	54 #endif
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	55
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	56 #include <errno.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	57 #include <stdio.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	58 #include <stdlib.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	59
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	60 #include "lwasm.h"
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	61 #include "util.h"
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	62
35 39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	63
39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	64 extern int lwasm_parse_line(asmstate_t as, lwasm_line_t l);
39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	65
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	66 // we can't use standard line inputting functions here because we have to
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	67 // handle non-standard line terminations (CR, LF, CRLF, or LFCR)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	68 int lwasm_read_file(asmstate_t as, const char filename)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	69 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	70 FILE *f;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	71 int c, c2;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	72 lwasm_line_t *nl;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	73 int lineno = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	74 char *fnref;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	75
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	76 // ought to be long enough...we truncate longer lines
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	77 char linebuff[2049];
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	78 int lbloc = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	79 int eol = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	80
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	81 // add filename to list
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	82 as -> filelist = lwasm_realloc(as -> filelist, sizeof(char ) (as -> filelistlen + 1));
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	83 fnref = as -> filelist[as -> filelistlen] = lwasm_strdup(filename);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	84 as -> filelistlen += 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	85
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	86 f = fopen(filename, "r");
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	87 if (!f)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	88 return -1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	89
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	90 for (;;)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	91 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	92 c = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	93 if (c == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	94 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	95 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	96 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	97 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	98 else if (c == '\r')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	99 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	100 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	101 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	102 // check for '\n':
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	103 c2 = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	104 if (c2 == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	105 c = EOF;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	106 else if (c2 != '\n')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	107 ungetc(c2, f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	108 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	109 else if (c == '\n')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	110 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	111 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	112 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	113 // check for '\r':
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	114 c2 = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	115 if (c2 == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	116 c = EOF;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	117 else if (c2 != '\r')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	118 ungetc(c2, f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	119 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	120 else
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	121 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	122 // silently ignore characters past 2K on a line... FIXME
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	123 if (lbloc < 2048)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	124 linebuff[lbloc++] = c;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	125 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	126 if (eol)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	127 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	128 eol = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	129 lbloc = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	130 nl = lwasm_alloc(sizeof(lwasm_line_t));
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	131 nl -> text = lwasm_strdup(linebuff);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	132 nl -> lineno = lineno++;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	133 nl -> filename = fnref;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	134 nl -> next = NULL;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	135 nl -> prev = as -> linestail;
26 d2e86babd958 Added error tracking infrastructure lost parents: 22 diff changeset	136 nl -> err = NULL;
28 c0ff62e5ad39 Added register list mode handler lost parents: 27 diff changeset	137 nl -> fsize = 0;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 35 diff changeset	138 nl -> sym = NULL;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	139 if (as -> linestail)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	140 as -> linestail -> next = nl;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	141 else
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	142 as -> linestail = nl;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	143 if (!(as -> lineshead))
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	144 as -> lineshead = nl;
35 39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	145 lwasm_parse_line(as, nl);
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	146 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	147 if (c == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	148 break;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	149 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	150
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	151 fclose(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	152 return 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	153 }
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	154
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	155 void lwasm_pass1(asmstate_t *as)
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	156 {
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	157 as -> passnum = 1;
27 f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	158 as -> addr = 0;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	159
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	160 if (lwasm_read_file(as, as -> infile) < 0)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	161 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	162 fprintf(stderr, "Error reading input file '%s'", as -> infile);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	163 perror("");
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	164 exit(1);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	165 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	166
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	167 }

Mercurial > hg-old > index.cgi

annotate src/pass1.c @ 37:538e15927776